Weft detector in transferrer



y 1929- o. v. PAYNE 1,711,615

WEFT DETECTOR IN TRANSFERRER Filed Nov. 15, 1926 33 Q m "I J L i" b. 340 lm /zzar tending Patented May 7, 1929.

UNITED" STATES OSCAR V. PAYNE, F WORCESTER, MASSACHUSETTS,

1,211,615 PATENT OFFICE.

Assrsnon TO onomzero v &

' KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

WEFT DETECTOR IN TEANSFERRER.

Application. filed November .15, 1926. Serial No. 148,402.

This invention relates to improvements in we ft detectors for looms and more particle larly to the type of loom having a regularly moving transferrer to present the detector to the surface to be detected every alternate pick of the loom.

In looms of the type set forth in patentto Ityon No. 1,372,316 there is provideda transferrer arm which receives a downward movement on each detecting pick of the loom and the replenishing mechanism is provided with an indicating lever arranged to be oscillated at the time of indication of weft exhaustion to initiate replenishment. In such devices it has been customary to employ a plunger and some means, either alatch or a spring, to retain the plunger in non-indicating position. It is an important object of my present invention to simplify constructions heretofore employed by connecting the indicating plungor directly to the carrier for the weft detector and thus obviate the use of a latch.

It is a further object of my invention to employ a weighted carrier for the detector so arranged that asthe transferrer arm reaches the lower limit of its movement the weighted member will continue to move downwardly to transmit force to the detector and plunger to move the same toward indicating position.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and ar rangementof parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenient embodiment of my invention,

Fig. 1 is a vertical section through a transferrer having my invention applied thereto and looking toward the front of the loom, with the mechanism located on the right hand side of the loom and showing the parts in non-indicating position,

Fig. 2 is a view similar to Fig. 1 but showing the parts swung to indicating position,

Cil

Fig. 3 is a horizontal section on line 3-3 of Fig.1, and

Fig. t is a top plan view of a portion of the structure looking in the direction of arrow 4, Fig. 1.

Referring to the drawings, the transferrer arm 10 has a pair of spaced vertical walls 11 connected by a web 12 to define a recess 13. The web stiffens the arm and is provided with a heel 14 to engage the butt of'the bobbin B at the time of transfer.

An indicating lever L,.a portion of which is shown in Fig. 2, is mounted 011 the magazine and has a depending part which lies closely adjacent to the transferrer arm 10. Onevery alternate or detecting beat of the 100m when the shuttle is under the magazine the transferrer arm receives a downward motion to avard the bobbin B and at the time of indica tion of weft exhaustion a member is projected from the transferrer arm to engage the lever L and oscillate the same about its pivot. This operation iswell known and for a further explanation of the same reference may be had to the aforesaid patent to Ryon. In carrying my present invention into effeet I provide each wall '11 with an upstanding horn and provide a rivet or other bearing 21 which extends between said horns 20 to. afford pivotal support for a three-armed lever 22. One of the arms 23 of this lever extends downwardly between the horns and is pivotally connected as at 24 to a plunger 25 extending horizontally "in recess 13. Said plunger has a head 26 which slides, in the vertical part of the web 12 and is normally in theretracted non-indicating position shown in Fig. 1.

The lever 22 is provided with another arm 27 extending horizontally and provided with a pair of spaced ribs 28 which define a groove to receive the horizontal arm 29 of a weft detector carrier 30. Said arm 29 has a slot 31 through which passes an adjusting securing screw 32, said screw and ribs 28 fixing the position of the carrier relatively to the lever 22 in any of its adjusted positions. The

' carrier 30, which may bemade of sheet steel,

is formed at the lower end thereof with an inverted T-shaped head 33 made bybending the sheet stock back on itself to form portions of double thickness.

The detector is formed of a U-shaped rod" 34. having a short leg 35 passing freely through a portion of the head 33. and a longer leg 36 extending through the other part of the head 33 and having secured thereto a stop collar 37 by means of screw 38. A coil compression spring 39 lies between the arm 29 and collar 30 and tends normally to move the detector to its lowest position, this position being determined by engagement of the collar 37 with the T-shaped head 33.

The third arm of the lever 22 is extended horizontally to the right as at 10 to lie on that side of the pivot 21 opposite the detector and is intended to have a greater turning moment about the pivot than those parts carried by thelever 22 which lie on the detector side of the pivot. A compression spring 41 is interposed between the web 12 and a pin 42 on the plunger 25 and tends to hold the latter in the position shown in Fig. 1 against a stop 43 fixed to the transferrer arm.

In. operation the transferrerarm will be brought down on each detecting beat ofthe loom to present the teeth 14 on the detector to the surface to be detected. As the transferrer continues its downward movement spring 39 will be compressed, and as the transferrer comes to rest the weighted arm 40 will tend because of energy stored therein to move lever 22 around pivot 21. When sufficient yarn for continued weaving is present the teeth 1 1 will be restrained against movement to the left and the lever 22 will therefore be held against movement relatively to the transferrer arm. When insufficient weft is present, however, the pressure exerted by the weighted arm 40 will move the teeth along-the barrel of the bobbin to the position indicated in Fig. 2, moving the lever 22 in a clockwise direction and projecting the head 26 of the indicating plunger from the position shown in Fig. 1 to that shown in Fig. 2 under the indicating lever L. The transferrer will immediately thereafter move upwardly so that the plunger will engage lever L and move the same in the manner set forth in said patent to Ryon. As lever 22 starts to turn the spring 39 will ex pand and add its effect to that of the weighted arm 40. The spring 39 preferably is stronger than the spring 41. As soon as the lever L has been given its complete indicating movement and passes out of operative contact with the plunger it will be moved by spring 41 to the right and be restored to the normal po sition indicated in Fig. 1.

From the foregoing it will be seen that I have provided a detector employing a very few parts and that all of the moving parts are operatively connected together. It will further be seen that the detector teeth are given an opportunity to be embedded in the yarn before they are called upon to movelongitudinally of the bobbin, this effect being brought about by delaying the application of the turning force on lever 22 until the transferrer has reached the bottom of its movement and the teeth have been brought into contact with the surface to be detected. It will further be seen that no latches are necessary in order to retain the plunger 25 in nonindicating position. Also, spring 39 aids the weighted arm 40 to keep the lever 22 moving after it has started toward indicating position, said spring being increasingly efiective as the energy stored in the arm 40 is absorbed.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is:

1. In a weft detector for a loom having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating plunger normally in nonindicating position, a weft detector, and a carrier for the detector movably mounted on the transferrer arm and movablewith the detector when the latter indicates substantial weft exhaustion and means to positively connect the plunger and carrier together, so that the detector and plunger will move in unison at all times.

2.'In a Weft detector for a loom having a transferrer arm moving toward the surface to be detected on each detecting beat of the loom, an indicating plunger normally in non-indicating position, a weft detector carrier pivoted to the transferrer arm and movable relatively thereto at the time of indication of weft exhaustion, means to positively connect the plunger and carrier to each other at all times, and a weft detector supported by the carrier and preventing movement of the plunger and carrier when sufficient weft is present but moving along the surface to be detected at substantial exhaustion to cause said carrier and plunger to move together to indicating position, said detector and carrier having a pivotal movement in unison with a movement of the plunger;

3. In a weft detector for a loom having a transferrer arm moved toward the surface to be detached on each detector beat of the loom, an indicating plunger element movable longitudinally in the transferrer arm and normally in non-indicating position, a. detector supporting element movably mounted on the transferrer arm, a detecting element supported by the carrier and mounted for relative movement with respect thereto, said indicating and carrier elements remaining at rest relatively to the transferrer arm when sufiicient weft is present. and means normally connecting all of said members to gether positively at all times so that at indication of weft exhaustion all of said elements will have a movement in the direction of the length of the surface to be detected to move the indicating element to indicating position.

4. In a weft detector for a loom having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating plunger element normally in non-indicating position and movably mounted on and with respect to the transferrer arm, a detector carrying element pivotally mounted on the transferrer arm, said elements being pivotally connected together, and a detecting element movably mounted on the carrier element andniovable at substantial exhaustion along the surface'to be detected to move said pivoted elements to indicating position, said indicating and carrying element movingin unison.

5. In a weft detector for a loom having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating plunger element normally in non indicating position and movable relatively to the transferrer arm to indicating position, a detector carrying element movably mounted on the transferrer arm, and a weft detecting element movably mounted on the carrying element, said indicating and carrying elements being positively connected together and movement of the detecting element longitudinally of the surface to be detected in either direction communicating motion positively to said indicating and carrying elements to move the indicating elementtoward and from indicating position positively.

6. In a weft detector for a loom having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating plunger element movably mounted on the transferrer arm and normally in non-indicating position but movable toward indicating position, a weft detecting element movably mounted on the transferrer arm and movable along the surface to be detected at indication of weft exhaustion, and means positively connecting the indicating and detecting elements together normally effective at all times to cause movement of the indicating element toward indicating position when the indicating element moves along the surface to be detected.

7. In a weft detector for a loom-having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating plunger element movably mounted on the transferrer arm and normally in non-indicating position but movable toward indicating position, a weft detecting element movably mounted on the transferrer arm and movable along the surface to be detected at indication of weft exhaustion, means positively connecting the indicating and detecting elements together normally effective at all times to cause movement of the indicating element toward indicating position when the indicating element moves along the surface to be detected, and resilient means effective normally to return the indicating element to non-indicating position and the detector to normal position.

8. In a weft detectorfor a. loomihaving a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating element normally in nonindicating position and movable relatively to the transferrer arm toward indicating posi tion, a member pivotally inounte'd on 'the transferrer arn'na weft detector mounted on the member to one side of the pivot thereof, and a weighted element rigid with the member and located on the opposite side of the pivot from thedetector, said" detector extend in downwardly to have engagzjcment with the surface to be detected before the transferrer arm reaches the lowerlimit of its movement,

parts extending on each side of the pivot thereof with respect'to the direction in which the transferrer arm moves toward the surface to' be detected, a weft detector movably mounted on said member along a line parallel to the motion of the transferrer toward the surface to be detected and located on one side of the pivot of said member, and a weighted element rigid with the member and lying on the other side of the pivot of the latter, the turning moment of the member due to the weighted element being greater than the turning moment of the member due to the weight of the detector, said detector engaging the surface to be detected before the transferrer arm reaches the lower limit of its movement, and the member tending to turn toward the indicating element after the transferrer arm has come to rest at the lower limit of its movement due to the greater turning moment of the weighted element;

10. In a weft detector for a loom having a transferrer arm moved toward the surface to be detected on each detecting beat of the loom, an indicating element movably mounted on the transferrer arm and normally in non-indicating position, a member pivoted to the transferrer arm, a detector slidably mounted on the member toward and from the surface to be detected and normally in its lowest position relatively to the t-rans- 12. In a weft detector for a loom havinga transferrer arm moved toward the surface to be detected on each detecting beatof the loom, a member pivoted to the transferrer arm, a weft detector slidably mounted thereon in a direction toward and from the surface to be detected, resilient'means acting along a line passing to one side of the pivot of the member to hold said detector toward the surface to be detected, and a weighted member ,operatively connected to the member and tending by reason of the energy stored therein due to; its motion to turn the member about its pivot and the detector along the surface to be detected, said detector moving at substantial exhaustion under the action of the weighted member, and the resilient means a transferrer arm moved toward the surface to be detected on each detectingbeat of the loom, a member pivotally mounted on the transferrer arm, a weft detector slidably mounted on the member in a direction toward and from the surface to be detected, a compression spring interposed between the member and the detector and tending to hold the latter toward the surface to be detected to engage said surface before the transferrer arm reaches the lower limit of its movement, said spring being thereby compressed, and weighted means acting to turn the member about the pivot thereof after the detector has engaged the surface to be. detected, said spring expanding to assist in turning the member and moving the detector toward indicating position as the energy stored in the weighted member is spent on indicating beats of the loom.

In testimony whereof I have hereunto aflixed my signature.

OSCAR V. PAYNE 

